Hoisting apparatus



(No Model.)

J.BOYD. HOISTING APPARATUS.

No. 441,742. Patented Dec. 2, 1890.

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Uterine rates PATENT @n'rrcn.

JAMES BOYD, OF ST. PAUL, MINNESDTA.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 441,742, dated December2, 1890. Application filed April 28,1890. Serial No. 349,772. (Nomodel.)

To all whom, it may concern.-

the sidesA A and with their free ends g Be it known that I, J AMEs BOYD,a citizen lying alongside each other and within a slot g of the UnitedStates, residing at St. Paul, in in a lever G, as shown. This lever G ispiv- 55 thecountyof Ramsey and Stateof Minnesota, oted at g by a bracketH upon the lower 5 have invented certain new and useful I-niside'of theside piece A, and with an arm G provelnents in Hoisting Apparatus, ofwhich projecting from one end,and with a socket G the following is aspecification. on the other end, in which the handle G is This inventionrelates to that class of hoistsecured. The pivot 9 passes through a slot60 ing apparatus employed in elevating the main the lever G, so that thelever may be held ierial in the erection of buildings; and it conbackwith the point g of the arm G in consists in the construction,combination, and tact with the under side of the side pieceA arrangementof parts, as hereinafter shown as in Fig. 2, or pushed backward untilthe t and described, and specifically pointed out in point Fig clear ofthe side piece A as in Fig. 65

the claims. By this means the lever G is utilized to In the drawings,Figure l is a side clevaperform two functionsviz., to throw the tion,partially in section, of the upper part of hooked ends d of' thecrank-arms D to one the frame of the apparatus, with inyimproveside todisengage them from the correspond-- ments attached thereto. Fig. 2 isan end eleing hooks (Z on the castings K, by which the 70 vation, andFig. 3 is a planview of the same. cables K are connected to the cages,and thus 2) Fig. 4 represents the guide-cable tightening release thecages when they are required to de-' device detached. Fig. 5 is across-sectional scend, and, second, to throw the brake-straps viewthrough the center of the frame, illusinto action, and thus serve as abrake-lever. tratingthe eonstructionof the combined brake hen the pointg of the lever G is in posi- 7 5 and cage-releasing lever. Fig. 6 is afront tiou against the lower side of the side piece View, Fig.7 is aplan view, and Fig. S'is a A the handle Gcanbeactuatedonlybybeingsectional side View, enlarged, of the clip for moved upward, whichaction will disengage holding the guide-cables. Fig. 9 is a perspecthehooks dfrom the hooks (1 but will not aftive view of the same. foot thebrake-straps; but if the brakes are to .80

The horse or frame portion consists of two be set the lever G will bepushed backward 3o channel-iron sides A A connected at their until thepoint 9 is clear of the side A as in ends by castings B, in which alsothe legs 13? Fig. 5, when the lever G is free to be drawn of gas-pipeare supported, as shown. downward, which action will cause the brake-Journaled across the sides A A are two straps to be drawn downwarduponthesheaves 85 grooved cable wheels or sheaves E, over E, and thusbrake the cages and regulate which the cables for hoisting the cagestheir motion. run. These cages carrythe material to be ele- The sidepieces A" A are each provided vated, and are shown in Patents No.271,681 with a truss-rod A arranged with their ends and No. 308,340,granted to me February 6, held in the end castings B and with their cen;90 1883, and November 25, 1884; but, as they are ters supported by ahook H on the bracket 0 not necessarily a part of the present inven- Hor by any other suitable means to assist tion, they are not shown. incarrying the strains and to prevent the Each of the sheaves E isprovided with a sagging of the horse or frame. brake-strap E each strapbeing fastened by N N N N represent the guide-cables be- 5 one end at ato the end castings l3, and with tween which the cages run up and down,and the other ends pivoted at a to crank-levers are held by their lowerends in clips M. (See D, the latter being in turn pivoted at their Fig.1.) One face of this clip is formed with elbows 1) between the sides A Aof the a half-round groove on, this groove being frame. One arm of eachof these crank-lesmaller at its center m than at the ends, and 100 versD projects downward, and is provided with U-bolts m one on each side ofthe with a barbed or inclined catch (1, while the central shallow part mof the groove mso other end of each is pivoted at d to levers F, thatwhen the cable is clamped fast to the clip the latter being in turnpivoted at 6 between by the U -bolts the shallow portion will cause itto assume an angular or curved form, as shown at m in Fig. 8, and thusincrease the holdingpower of the clip.

J ournaled upon top of the side A at points corresponding to theguide-cables N N N N are small drums formed with disks 'n, shanks nratchets a and square or other irregular shaped nuts on, the nuts anddisks having slots or grooves a formed through them for the reception ofthe cables. The shanks n are secured to the side A by cap a and the samecapalso has a pawl n adapted to engage with the ratchet n. By thesesimple devices the guide-cables may be tightened to as great an extentas desired by simply inserting them through the slots 72 and turning thedrum by a wrench placednpon the nuts 01*, the pawl acting upon theratchets and holding the ten sion when obtained, the unused portion ofthe cables lying across the face of the horse or frameand being coiledup outof the way.

The guide-cables N N N "N are necessarily as long as the highestbuilding in which the machine is to be employed, the surplus of thecables being coiled upon or near the horse, and as thehorse is movedfrom story to story as the building progresses the cables mustbereleased and graspedatahigher point 5 hence it will be readily seenthat a very inn portant advantage of this form of tightening and holdingdrum is the facility with which the guidc-cables'can be grasped and heldat any point.

lower ends adapted to engage with corresponding hooks on the cagescontaining the material to be elevated, and connected to saidbrake-straps, and means whereby the move mentof said crank-levers willrelease said cages and set said brakes, substantially as and for thepurpose set forth.

2. In a hoisting apparatus of the class described, a horse or frameadapted to support the cable-sheaves E, brake-straps E bearing againstsaid sheaves, crank-levers D, pivoted to said horse or frameand havinghooks on their lower ends adapted to engage with corresponding hooks onthe cages containing the material to be elevated, and connected to saidbrake-straps, levers F, pivoted to said horse or frame and also to saidcrank-arms,land a lever G, pivoted to said horse or frame and also tosaid levers F, and: provided with @arm G whereby when said lever G ismoved-in one direction said cages-will bereleasedand when lIlOVGddlltheopposite direction said brakes will be set,substantially asand forthe purpose setforth.

3.111 ahoisting-'maehineot the class described, a horse or frame oarrying thehoistingcables by which the cages are raisedandlom ered, andguide-cables for said cages, in com bination with devices for tighteningandholding the saidcables, consisting of the drums having the disks 01,provided with slots n,

through which the cables are adapted to be passed and wound around saiddrnmsyand With-ratchet a and adapted-to be held' in place by pawl nwhereby said cables may be held at any point in theirlengths,substantially as and for the purpose: set forth.

In testimony whereof I havehereuntoset my hand in the presence oftwosubscribin g witnesses.

JAMES BOYD.

\Vitnesses:

OJN. WoonwAnn, lI. Wnnsrnn.

